EP0290612A1 - Product ejecting apparatus for injection molding machines - Google Patents
Product ejecting apparatus for injection molding machines Download PDFInfo
- Publication number
- EP0290612A1 EP0290612A1 EP87906786A EP87906786A EP0290612A1 EP 0290612 A1 EP0290612 A1 EP 0290612A1 EP 87906786 A EP87906786 A EP 87906786A EP 87906786 A EP87906786 A EP 87906786A EP 0290612 A1 EP0290612 A1 EP 0290612A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rod
- ejector
- platen
- ball screw
- product
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/66—Mould opening, closing or clamping devices mechanical
Definitions
- the present invention relates to product ejectors for use in injection molding machines and, particularly, to a product ejector in a direct-acting type mold clamping system in which a ball screw is driven by a servomotor to move a moving platen fixedly mounted to a ball nut threadedly engaged with the ball screw, thereby carrying out mold clamping.
- a product ejector for removing a product from a mold which is of such a type that, during rearward movement of a moving platen toward a rear platen, a rod fixed to the rear platen pushes an ejector plate, short of a point of time mold opening is completed, to project a product ejector bar fixedly mounted to the ejector plate, toward the mold mounted on the moving platen, thereby ejecting a product from the mold.
- a product ejector is also known, which is of such a type that a driving source separate from a driving source for a mold clamping system is employed to drive a product ejector bar to project the same, thereby removing a product from a mold.
- a direct-acting type mold clamping system has been developed, in which a ball screw is rotated by a servomotor, to move a moving platen which is movable together with a ball nut threadedly engaged with the ball screw, to thereby carry out mold closing, mold clamping and Told opening.
- the arrangement of the invention is such that a rod is mounted on a forward end of the ball screw, an ejector plate is fixedly mounted to an end of an ejector bar on the side of the rod so as to be engageable with the rod, the ejector bar being arranged within a bore provided in the moving platen in such a manner that the ejector bar extends through the bore and is slidable, and a spring is arranged between the ejector plate and the moving platen for biasing the ejector bar toward the ball screw.
- the arrangement of the invention is such that the rod mounted to the forward end of the ball screw extending to a position near the moving platen pushes the ejector bar toward a mold just before completion of mold opening motion of the moving platen, to eject a product from the mold.
- the product can be ejected and removed without the use of an especial driving source for ejection of a product and with a simple structure, and the rod can be reduced in length so that no particular consideration is required to be given to deflection and strength of the rod.
- Figure is a partially cross-sectional view of a principal portion of a product ejector according to an embodiment of the invention.
- the reference numeral 1 denotes a moving platen
- the reference numeral 2 designates a rear platen which is fixedly mounted to a base (not shown) of an injection molding machine.
- One of a pair of molds (not shown) is mounted on the moving platen l, and the other mold is mounted on a stationary platen (not shown) which is fixedly secured to the base of the injection molding machine.
- the moving platen 1 has both edge portions which are formed therein with respective bores (not shown). Tie bars 3 and 3 extending between the rear platen 2 and the stationary platen are inserted respectively through the bores in the moving platen 1 so that the moving platen 1 is supported for movement along the tie bars 3 and 3 to the right and left as viewed in the figure.
- the reference numeral 4 denotes a ball screw having an end portion, on the side of the rear platen 2, which is supported by the latter for rotation, but against axial movement.
- the end portion of the ball screw 4 is connected to a servomotor (not shown) mounted to the rear platen 2.
- the reference numeral 5 denotes a ball nut threadedly engaged with the ball screw 4.
- the ball nut 5 has a forward end which is fixedly attached to a rear end of a nut attachment 6 by means of bolts 16.
- the nut attachment 6 has a forward end which is fixedly mounted to a rear side of the moving platen 1 by means of bolts 16'.
- the nut attachment 6 has a cylindrical shape, and is formed such that an end of the nut attachment to which the ball nut 5.
- the nut attachment 6 is formed therein with a bore 7 through which the ball screw 4 passes and which extends along an axis of the nut attachment 6.
- a large space 8 is provided in the nut attachment 6 on the side of the moving platen.
- a product ejector bar 10 has a rearward end which projects into the space 8.
- the product ejector bar 10 slidably extends through a bore 9 provided in the moving platen 1 and is arranged in coaxial relation to the ball screw 4.
- An ejector plate 11 is fixedly mounted to the rearward end of the ejector bar.
- a spring 12 is arranged between the ejector plate 11 and the moving platen 1, for biasing the ejector plate 11 and the ejector bar 10 toward the ball screw 4.
- a splined section 10a is provided on an outer peripheral surface of a rearward half portion of the ejector bar 10, for preventing rotation of the ejector bar 10 and for guiding axial movement thereof.
- a spline nut 13 in slidable engagement with the splined section 10a is fixedly mounted to the moving platen 1.
- a threaded bore 14 is formed in the forward end portion of the ball screw 4 and extends along an axis thereof.
- a stroke adjusting rod 15 has a threaded section 15a which is threadedly engaged with the threaded bore 14. Alteration of the threadedly engaging position between the rod 15 and the ball screw 4 enables adjustment of an amount of projection (effective length) of the stroke adjusting rod 15 from the forward end face of the ball screw 4, in turn, an ejection stroke of the ejector bar 10.
- the stroke adjusting rod 15 has a forward end 15a which is formed into a spherically convex shape.
- a spherical recess lla is formed in a portion of the above-mentioned ejector plate 11, which is confronted with the forward end portion 15a.
- the arrangement is such that ⁇ hen the moving platen 1 is moved rearwardly (to the left as viewed in the figure3 to a predetermined position at mold opening, the spherically convex forward end 15b and the spherical recess 11a are brought into engagement with each other.
- the reference numeral 17 denotes a nut for preventing loosening of the stroke adjusting rod 15.
- the servomotor When mold closing and mold clamping are carried out, the servomotor, not shown, is driven rotatively in the normal direction to move the moving platen 1-in the right-hand direction in the figure.
- the motor is rotated in the reverse direction to move the moving platen 1 in the left-hand direction in the figure. That is, as the servomotor is driven rotatively in the reverse direction to rotate the ball screw 4 in the reverse direction, the ball nut 5 threadedly engaged with the ball screw 4 is moved in the left-hand direction in the figure along the axis of the ball screw 4.
- the moving platen 1 is also moved in the left-hand direction in the figure, through the nut attachment 6 fixedly mounted to the ball nut 5, thereby carrying out opening of the mold.
- the spherically convex forward end 15b of the stroke adjusting rod 15 is abutted against the spherical recess lla in the ejector plate 11.
- the forward end 15b of the stroke adjusting rod 15 pushes the ejector plate 11 to move the ejector plate 11 and the ejector bar 10 in the right-hand direction in the figure against the spring 13.
- the ejector bar 10 projects into the mold to eject a product therefrom.
- the stroke adjusting rod 15 rotates with rotation of the ball screw 4
- the rotation of the stroke adjusting rod 15 is not transmitted to the ejector plate 11.
- the ejector bar 10 is engaged with the spline nut fixedly mounted to the moving platen 1, through the splined section 10a, the ejector bar 10 is prevented from rotating. Accordingly, the ejector bar 10 does not also rotate. Thus, the ejector bar 10 does not mar a molded article at ejection.
- the ejection amount of the ejector bar 10, that is, the ejection stroke is adjusted in such a manner that the threadedly engaging position of the stroke adjusting rod 15 with respect to the ball screw 4 is adjusted to alter the ejection amount of the stroke adjusting rod 15 from the end face of the ball screw 4.
- either one of the moving platen 1 and the ejector bar 10 may be provided thereon with an elongated projection or projections, and the other may be provided therein with a groove or grooves with which the projection or projections are engaged.
- the forward end of the rod 15 and the opposed face of the ejector plate 11 have been described as being formed respectively into the spherically convex and concave shapes, but, in contrast with this, may be formed respectively into concave and cunvex shapes.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
- The present invention relates to product ejectors for use in injection molding machines and, particularly, to a product ejector in a direct-acting type mold clamping system in which a ball screw is driven by a servomotor to move a moving platen fixedly mounted to a ball nut threadedly engaged with the ball screw, thereby carrying out mold clamping.
- In an injection molding machine, there is known a product ejector for removing a product from a mold, which is of such a type that, during rearward movement of a moving platen toward a rear platen, a rod fixed to the rear platen pushes an ejector plate, short of a point of time mold opening is completed, to project a product ejector bar fixedly mounted to the ejector plate, toward the mold mounted on the moving platen, thereby ejecting a product from the mold. A product ejector is also known, which is of such a type that a driving source separate from a driving source for a mold clamping system is employed to drive a product ejector bar to project the same, thereby removing a product from a mold.
- A direct-acting type mold clamping system has been developed, in which a ball screw is rotated by a servomotor, to move a moving platen which is movable together with a ball nut threadedly engaged with the ball screw, to thereby carry out mold closing, mold clamping and Told opening.
- It is required for the above direct-acting type mold clamping system to set a length of the ball screw supported by a rear platen, to a considerably large value corresponding to a moving stroke of the moving platen. It is also required to prevent the ball srew and the platen from interfering with each other at a position where mold opening is completed. As a result, the spacing distance between the rear platen and the moving platen becomes long. By this reason, if the rod for pushing the product ejector bar mounted on the side of the moving platen is fixed to the rear platen, the rod becomes long, so that deflection might occur or a problem might arise on the strength. On the other hand, if an attempt is made to carry out driving of the product ejector bar without the use of the long rod, a driving source for ejection of a product is especially required, making the injection molding machine expensive.
- It is therefore an object of the invention to provide a product ejector in a motor-driven, direct-acting type mold clamping system for an injection molding machine, in which a product can be ejected without the necessity of a driving source for exclusive use and with a simple structure, and it is possible to reduce a length of a rod for transmitting driving force to an ejector bar.
- In order to achieve the above-mentioned object, in a product ejector in a direct-acting type mold clamping system in which a ball screw is rotated by a motor to move a moving platen fixedly mounted to a ball nut threadedly engaged with the ball screw, thereby carrying out mold clamping, the arrangement of the invention is such that a rod is mounted on a forward end of the ball screw, an ejector plate is fixedly mounted to an end of an ejector bar on the side of the rod so as to be engageable with the rod, the ejector bar being arranged within a bore provided in the moving platen in such a manner that the ejector bar extends through the bore and is slidable, and a spring is arranged between the ejector plate and the moving platen for biasing the ejector bar toward the ball screw.
- As described above, the arrangement of the invention is such that the rod mounted to the forward end of the ball screw extending to a position near the moving platen pushes the ejector bar toward a mold just before completion of mold opening motion of the moving platen, to eject a product from the mold. By virtue of such arrangement, the product can be ejected and removed without the use of an especial driving source for ejection of a product and with a simple structure, and the rod can be reduced in length so that no particular consideration is required to be given to deflection and strength of the rod.
- Figure is a partially cross-sectional view of a principal portion of a product ejector according to an embodiment of the invention.
- In the figure, the reference numeral 1 denotes a moving platen, and the reference numeral 2 designates a rear platen which is fixedly mounted to a base (not shown) of an injection molding machine. One of a pair of molds (not shown) is mounted on the moving platen l, and the other mold is mounted on a stationary platen (not shown) which is fixedly secured to the base of the injection molding machine. The moving platen 1 has both edge portions which are formed therein with respective bores (not shown). Tie bars 3 and 3 extending between the rear platen 2 and the stationary platen are inserted respectively through the bores in the moving platen 1 so that the moving platen 1 is supported for movement along the tie bars 3 and 3 to the right and left as viewed in the figure. The reference numeral 4 denotes a ball screw having an end portion, on the side of the rear platen 2, which is supported by the latter for rotation, but against axial movement. The end portion of the ball screw 4 is connected to a servomotor (not shown) mounted to the rear platen 2. The
reference numeral 5 denotes a ball nut threadedly engaged with the ball screw 4. Theball nut 5 has a forward end which is fixedly attached to a rear end of anut attachment 6 by means ofbolts 16. Thenut attachment 6 has a forward end which is fixedly mounted to a rear side of the moving platen 1 by means of bolts 16'. Thenut attachment 6 has a cylindrical shape, and is formed such that an end of the nut attachment to which the ball nut 5. is attached is small in diameter, while an end of the nut attachment on the side of the moving platen is large in diameter. Thenut attachment 6 is formed therein with a bore 7 through which the ball screw 4 passes and which extends along an axis of thenut attachment 6. A large space 8 is provided in thenut attachment 6 on the side of the moving platen. - A
product ejector bar 10 has a rearward end which projects into the space 8. Theproduct ejector bar 10 slidably extends through abore 9 provided in the moving platen 1 and is arranged in coaxial relation to the ball screw 4. Anejector plate 11 is fixedly mounted to the rearward end of the ejector bar. Aspring 12 is arranged between theejector plate 11 and the moving platen 1, for biasing theejector plate 11 and theejector bar 10 toward the ball screw 4. A splinedsection 10a is provided on an outer peripheral surface of a rearward half portion of theejector bar 10, for preventing rotation of theejector bar 10 and for guiding axial movement thereof. Aspline nut 13 in slidable engagement with the splinedsection 10a is fixedly mounted to the moving platen 1. - On the other hand, a threaded bore 14 is formed in the forward end portion of the ball screw 4 and extends along an axis thereof. A
stroke adjusting rod 15 has a threadedsection 15a which is threadedly engaged with the threaded bore 14. Alteration of the threadedly engaging position between therod 15 and the ball screw 4 enables adjustment of an amount of projection (effective length) of thestroke adjusting rod 15 from the forward end face of the ball screw 4, in turn, an ejection stroke of theejector bar 10. Thestroke adjusting rod 15 has aforward end 15a which is formed into a spherically convex shape. On the other hand, a spherical recess lla is formed in a portion of the above-mentionedejector plate 11, which is confronted with theforward end portion 15a. The arrangement is such that νhen the moving platen 1 is moved rearwardly (to the left as viewed in the figure3 to a predetermined position at mold opening, the spherically convexforward end 15b and thespherical recess 11a are brought into engagement with each other. Additionally, thereference numeral 17 denotes a nut for preventing loosening of thestroke adjusting rod 15. - The operation of the ejector according to the embodiment will next be described.
- When mold closing and mold clamping are carried out, the servomotor, not shown, is driven rotatively in the normal direction to move the moving platen 1-in the right-hand direction in the figure. On the other hand, when mold opening is carried out, the motor is rotated in the reverse direction to move the moving platen 1 in the left-hand direction in the figure. That is, as the servomotor is driven rotatively in the reverse direction to rotate the ball screw 4 in the reverse direction, the
ball nut 5 threadedly engaged with the ball screw 4 is moved in the left-hand direction in the figure along the axis of the ball screw 4. The moving platen 1 is also moved in the left-hand direction in the figure, through thenut attachment 6 fixedly mounted to theball nut 5, thereby carrying out opening of the mold. Short of completion of the mold opening, the spherically convexforward end 15b of thestroke adjusting rod 15 is abutted against the spherical recess lla in theejector plate 11. As the moving platen 1 is further moved in the left-hand direction in the figure toward a position where the mold opening is completed, theforward end 15b of thestroke adjusting rod 15 pushes theejector plate 11 to move theejector plate 11 and theejector bar 10 in the right-hand direction in the figure against thespring 13. As a result, the ejector bar 10 projects into the mold to eject a product therefrom. - Meanwhile, although the
stroke adjusting rod 15 rotates with rotation of the ball screw 4, the rotation of thestroke adjusting rod 15 is not transmitted to theejector plate 11. In addition, since theejector bar 10 is engaged with the spline nut fixedly mounted to the moving platen 1, through thesplined section 10a, theejector bar 10 is prevented from rotating. Accordingly, theejector bar 10 does not also rotate. Thus, theejector bar 10 does not mar a molded article at ejection. Further, if runout occurs on the ball screw 4 with respect to its axis during rotation of the ball screw, or if thestroke adjusting rod 15 is not corectly arranged in coaxial relation to the ball screw 4, theforward end 15b of therod 15 would move while describing an eccentric circle. However, even if theforward end 15b moves while describing an eccentric circle, engagement of therod 15 and theejector plate 11 with each other through the spherically convexforward end 15b and thespherical recess 11a ensures that theejector plate 11 and theejector rod 10 are pushed axially by therod 15 to eject a product. Additionally, the ejection amount of theejector bar 10, that is, the ejection stroke is adjusted in such a manner that the threadedly engaging position of thestroke adjusting rod 15 with respect to the ball screw 4 is adjusted to alter the ejection amount of thestroke adjusting rod 15 from the end face of the ball screw 4. - Subsequently, as the moving platen 1 is driven to move in the mold closing direction, the
ejector plate 11 leaves therod 15, so that theejector plate 11 is returned to the initial position under the spring force of thespring 12. - The above embodiment has been described as utilizing the spline engagement for prevention of rotation of the
ejector bar 10 and for guide of movement of the same. In place of the spline engagement, however, either one of the moving platen 1 and theejector bar 10 may be provided thereon with an elongated projection or projections, and the other may be provided therein with a groove or grooves with which the projection or projections are engaged. - Further, the forward end of the
rod 15 and the opposed face of theejector plate 11 have been described as being formed respectively into the spherically convex and concave shapes, but, in contrast with this, may be formed respectively into concave and cunvex shapes.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61261929A JPH06104330B2 (en) | 1986-11-05 | 1986-11-05 | Product ejection device of injection molding machine |
JP261929/86 | 1986-11-05 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0290612A1 true EP0290612A1 (en) | 1988-11-17 |
EP0290612A4 EP0290612A4 (en) | 1989-10-16 |
EP0290612B1 EP0290612B1 (en) | 1992-02-26 |
Family
ID=17368667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87906786A Expired EP0290612B1 (en) | 1986-11-05 | 1987-10-16 | Product ejecting apparatus for injection molding machines |
Country Status (5)
Country | Link |
---|---|
US (1) | US4891002A (en) |
EP (1) | EP0290612B1 (en) |
JP (1) | JPH06104330B2 (en) |
DE (1) | DE3776901D1 (en) |
WO (1) | WO1988003471A1 (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9001019L (en) * | 1989-04-13 | 1990-10-14 | Outboard Marine Corp | DEVICE FOR PRECISION CASTING AND PROCEDURE FOR APPLICATION OF THE DEVICE |
US5139411A (en) * | 1991-04-01 | 1992-08-18 | Polacinski Michel C | Apparatus for reducing wear on mold ejection systems |
US5282732A (en) * | 1992-04-08 | 1994-02-01 | Davidson Textron Inc. | Mold press assembly |
JP3206204B2 (en) * | 1992-05-22 | 2001-09-10 | 株式会社デンソー | Throttle position sensor |
US6315544B1 (en) | 1999-10-07 | 2001-11-13 | Burger Engineering, Inc. | Adjustable length extension bars for connecting a mold ejector plate to a press ejector plate |
JP3406561B2 (en) * | 2000-03-21 | 2003-05-12 | 住友重機械工業株式会社 | Product ejection device of injection molding machine |
JP4808339B2 (en) * | 2001-07-10 | 2011-11-02 | 東芝機械株式会社 | Clamping device |
US7063868B2 (en) * | 2003-02-28 | 2006-06-20 | T.F.H. Publications, Inc. | Method of removing molded natural resins from molds utilizing lifter bars |
US7267538B2 (en) * | 2003-05-27 | 2007-09-11 | Efrain Morales-Centeno | Adjustable knockout |
JP5105612B2 (en) * | 2008-07-22 | 2012-12-26 | 株式会社名機製作所 | Ejector device and ejector device connection method |
JP2010052322A (en) * | 2008-08-29 | 2010-03-11 | Daiwa Kasei Kogyo Kk | Injection molding machine |
CN101954719A (en) * | 2009-07-17 | 2011-01-26 | 鸿富锦精密工业(深圳)有限公司 | Ejection mechanism of injection mold |
US8297967B2 (en) * | 2010-03-16 | 2012-10-30 | Acumen Co., Ltd. | Ejector device for an injection molding machine |
CN102198711B (en) * | 2011-04-13 | 2014-02-26 | 青岛海信模具有限公司 | Device for regulating length of angle ejector rod |
JP5607124B2 (en) * | 2012-01-13 | 2014-10-15 | 株式会社日本製鋼所 | Ejector device |
CN107310105B (en) * | 2017-08-19 | 2024-01-05 | 成都市联余精密机械有限公司 | Delayed ejection die structure for realizing in-die labeling of milk powder cover |
CN109954264B (en) * | 2019-04-16 | 2023-12-22 | 门延华 | Implement for improving football technique |
CN112721049A (en) * | 2020-12-15 | 2021-04-30 | 昆山兴丰汇精密模具有限公司 | High-efficient injection mold |
CN113954273B (en) * | 2021-11-17 | 2024-04-12 | 湖北长天通信科技有限公司 | Dismounting device special for rehabilitation imitation die |
CN115319971A (en) * | 2022-10-13 | 2022-11-11 | 宁波臻至机械模具有限公司 | Core pulling mechanism and mold |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0090863A1 (en) * | 1981-10-08 | 1983-10-12 | Nissei Plastic Industrial Co., Ltd. | Injection molding apparatus |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3158905A (en) * | 1962-01-19 | 1964-12-01 | Jaroslav J Havlik | Mechanical injection molding machine |
US3388431A (en) * | 1964-05-16 | 1968-06-18 | Aoki Katashi | Injection molding machine |
JPS4914537B1 (en) * | 1969-11-14 | 1974-04-08 | ||
US3669593A (en) * | 1970-02-10 | 1972-06-13 | Wilhelm Cyriax | Mold-closing means for molding machines |
FR2414998A1 (en) * | 1978-01-18 | 1979-08-17 | Guen & Hemidy Le | Coupling between injection moulder ejector ram and ejection plunger - is screwed rod through ram bore carrying adjustable tappet |
JPS5924311A (en) * | 1982-07-30 | 1984-02-08 | Mitaka Kogyo Kk | Program timer |
JPS5924311U (en) * | 1982-08-09 | 1984-02-15 | 日精樹脂工業株式会社 | Mold clamping device with molded product ejection mechanism |
JPH06280016A (en) * | 1993-03-25 | 1994-10-04 | Kobe Steel Ltd | Device for supplying raw material for plating in continuous vacuum vapor deposition plating |
-
1986
- 1986-11-05 JP JP61261929A patent/JPH06104330B2/en not_active Expired - Lifetime
-
1987
- 1987-10-16 US US07/204,554 patent/US4891002A/en not_active Expired - Fee Related
- 1987-10-16 EP EP87906786A patent/EP0290612B1/en not_active Expired
- 1987-10-16 WO PCT/JP1987/000797 patent/WO1988003471A1/en active IP Right Grant
- 1987-10-16 DE DE8787906786T patent/DE3776901D1/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0090863A1 (en) * | 1981-10-08 | 1983-10-12 | Nissei Plastic Industrial Co., Ltd. | Injection molding apparatus |
Non-Patent Citations (1)
Title |
---|
See also references of WO8803471A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE3776901D1 (en) | 1992-04-02 |
EP0290612B1 (en) | 1992-02-26 |
US4891002A (en) | 1990-01-02 |
WO1988003471A1 (en) | 1988-05-19 |
JPH06104330B2 (en) | 1994-12-21 |
EP0290612A4 (en) | 1989-10-16 |
JPS63115713A (en) | 1988-05-20 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR GB IT LI |
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17P | Request for examination filed |
Effective date: 19880426 |
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